text: # Copyright (c) 2017 OpenStack Foundation
  # All Rights Reserved.
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
  from oslo_log import log as logging
  
  from zun.scheduler import filters
  
  LOG = logging.getLogger(__name__)
  
  
  class CPUFilter(filters.BaseHostFilter):
      """DEPRECATED: Filter the containers by cpu request"""
  
      run_filter_once_per_request = True
  
      def __init__(self):
          super(CPUFilter, self).__init__()
          LOG.warning('The CPUFilter is deprecated since the 7.0.0 '
                      'Wallaby release. VCPU filtering is performed natively '
                      'using the Placement service when using the '
                      'filter_scheduler driver. Operators should define cpu '
                      'allocation ratios either per host in the zun.conf '
                      'or via the placement API.')
  
      def host_passes(self, host_state, container, extra_spec):
          if not container.cpu:
              return True
  
          cpu_free = host_state.cpus - host_state.cpu_used
          if cpu_free < container.cpu:
              LOG.debug("%(host_state)s does not have %(container_vcpus).2f "
                        "usable vcpus, it only has %(free_vcpus).2f usable "
                        "vcpus",
                        {'host_state': host_state,
                         'container_vcpus': container.cpu,
                         'free_vcpus': cpu_free})
              return False
          host_state.limits['cpu'] = host_state.cpus
          return True
  